Performance Analysis and Optimization of a Modified Stewart Platform for the Qitai Radio Telescope  

作　　者：Guljaina Kazezkhan Qian Xu Na Wang Fei Xue Hui Wang 

机构地区：[1]Xinjiang Astronomical Observatory,Chinese Academy of Sciences,Urumqi 830011,China [2]Key Laboratory of Radio Astronomy,Chinese Academy of Sciences,Urumqi 830011,China [3]Xinjiang Key Laboratory of Radio Astrophysics,Urumqi 830011,China

出　　处：《Research in Astronomy and Astrophysics》2023年第9期241-250,共10页天文和天体物理学研究（英文版）

基　　金：the National Natural Science Foundation of China(NSFC,grant No.12203095);the Youth Innovation Promotion Association,CAS(No.Y202019);Natural Science Foundation of Xinjiang Uygur Autonomous Region(No.2022D01B220);Tianchi Doctoral Program 2021;the Scientific Instrument Developing Project of the Chinese Academy of Sciences(No.PTYQ2022YZZD01).

摘　　要：This paper presents a modified Stewart platform that enables precise adjustment of the sub-reflector for the Qitai Radio Telescope(QTT).QTT demands a parallel platform capable of carrying a heavy load(≥4000 kg),and moving in elevation from 5°to 88°together with the primary reflector while precisely adjusting the sub-reflector’s position in five degrees of freedom.To meet these requirements,a modified Stewart platform with two separated actuators is proposed,and the comprehensive performance is analyzed and optimized for practical application.The performance of the modified platform is compared to that of the traditional Stewart platform,and the results demonstrate that the modified platform has superior load-bearing capacity and stiffness over the entire elevation angle with more uniform actuator load and stiffness distributions.These results indicate that the modified Stewart platform is well-suited for practical application in QTT.

关 键 词：telescopes-methods analytical-methods NUMERICAL 

分 类 号：P111.44[天文地球—天文学]